Taco Flo Checks 219-4, 241-4, 218-3, 220-6, 221-6, 222-6

Taco Flo Checks are used in forced hot water heating systems to prevent gravity circulation during periods when the boiler is hot, but the space heating zone is not wanted.

Taco Flo-Checks are also used in systems with multiple circulator zones to allow heat to flow only into the zones that are calling for heat. In addition, the thumb screw can be opened manually for gravity feed applications, if the main circulator stops operating.